Refrigerating apparatus.



, F. HIRTH. RPPRIGBRATING APPARATUS.

APPLICATION FILED AUG. 29, 1913.

1, 1 00,01 5. Patented June 16, 1914.

ff? N I @NITED 'STATES PATENT OFFICE.

FRANK BIRTH, or vFORT SMITH; ARKANSAS.

REFRIGERATINQ, ArrAnATUs.

' Specification of Letters Patent. i Patented June 16, 1914, Application mea August 29j' 1913. serial No. 787,291. f

To all whom it may concern.'

' Be it known that I, FRANK HIRTH, a citil zen of the United States residing in'Fort Smith, in the county of Sebastian and State of Arkansas, have invented certain new and useful Improvements in Refrigerat-ing Apparatus, of which' the lfollowing is a Specification. l

This invention relates particularly to refrigerating systems and ice-making apparatus of the kindin which gaseous ammonia is compressed, passed through al condenser,

where it is liquefied, transferred in a liquid form to a receiver, then carried to freezing tanks or other means for freezing or refrigerating and thence reconveyed to the compressor and'carried again to the-condensers,

but the invention may be employed in other systems o r apparatus varying in detail from that above outlined. f

\ In apparatus of the class above specified,"

the liquid ammonia is often mixed or contaminated with unconden'sed foul gases which clog the apparatus and impair its eiiciency, often requiring an unnecessarily high pressure to effect the circulation of the fluids o r a stoppage of the apparatus until the foul gases are eliminated. It has been found in practice that such foul gases 'would not only part-ly fill the condenserv but would pass with the liquid ammonia to the receiver and thence to the freezing tanks being trapped therein, impairing the efficiency thereof and preventing a proper circulation of therefrigerating Jmedium. Heretofore it has been necessary to suspend the operation of the apparat-us until the foul gases were lallowed to escape or were blown olf, orto work under high pressure with increased cost of operation and with reduced eiiiciency. The object of this invention is toy remove such uncondensed foul gases from the system and to thus increase the eiflciency of the appara-tus under a comparatively low pressure and without shutting down the plant.

In carrying out my invention I yconnect the condenser withpa liquid receiver in the usual way and I provide a receiver for foul gases which is also connected with the condenser andhas a separate connection with receiver, while the foul gases are allowed. to

escape through a suitable outlet.

.The accompanying drawing shows diagrammatically so much of a refrigerating 'apparatus with'iny invention applied as is necessary to illustrate my improvements.

The condenser A may be of the usual kind and receives ammonia from the compressors in the usual way. The liquid receiver .B's

.joined by a pipe G with the coupling c and pipe Clis thus connected with the condenser. `The 75 pipe G isprovided'with a v alve g to open' and close communication between the condenser andthe foul gas receiverand the upper end of the foul gas receiver is provided with a valved Outlet- H for foul gases. The

receiver F is held in an inclined position by suitable supports or standards f and the lower end of the receiver is connected4 by a pipe I with the liquid receiver B and this plpeI is providedwitha suitable valve J.

K indicates a perforated 'pipe for spraying water onto thereceiverF thus cooling it and causing 4any gaseous ammonia which may be inthe receiver to'be condensed.

f L indicates a gage of any suitable con-` v9i) struction applied to the receiver F. 4 p The liquid receiver B is connected at any suitable way with the freezing tanks or other 'desired parts of the refrigerating 'apparatus.

P indicates a gage of suitable construction applied to the receiver'B, and N and O indicate valved pipes usually'employed in lthis class of apparatus, 'N being a blow-olf pipev and O beingconnected with the condenser,

as usual. Y

In the normal operation of the apparatus the valves g and J are closed and the valves D,` E and C are also closed. The liquid ammonia passes fromthe condenser to the re- Pceiver by .way ofthe pipe O in the usual way and is conveyed from the receiver according to the usual. practice. If foul gas is indicated, oris present, the valves E, D, g, C

and J are opened. Any foul gases` which may vrise to the coupling c with the liquid ammonia separate from the liquid and pass to the foul gas receiver F through the pipe G and -may be allowed to escape through the outlet H which may bevleft open or may be. opened from time to time. Usually thefoul gases are mixed with gaseous ammonia and in order tosave this the spray pipe K is employed which condenses the gaseous aininonia which will collect on the bottom of the inclined receiver and pass, by way of the pipe I, to the liquid receiver B, while the uncondensable gases remainin the upper part of the receiver F or pass out through the outlet H. The liquid level in the receiver F consumption of fuel and the expense of operationis greatly reduced. v

I claim as my invent-ion:-

1. .A refrigerating apparatus, comprising acondenser, a receiver for the liquid ammonia., a foul gas'receiver located above and Y connected with the upper part of the condenser, a connection between the lower part -of the condenser and the liquid ammonia receiver, and a connection between said foul gas receiver and the receiver for liquid lammoma.

' 2. A refrigerating apparatus, comprising a condenser, a. receiver for the liquid ammonia, a foul gas receiver located above and connected with the upper part of the condenser, means for cooling said foul gas A receiver, a connection between the lower part connection between the foul. gas receiver and the receiver for liquid ammonia.

4.. A refrigerating apparatus, comprisingv a condenser, a receiver for the liquid aminonia, a connection between the condenser and said receiver, a foul gas receiver disposed at an inclination having its lower end connected with thecondenser and its upper end provided .with a valved outlet, and a connection vbetween the foul gas receiver and the liquid receiver.

A refrigerating apparatus, comprising a condenser, a receiver for the liquid aininonia connected therewith, a foul gas receiver disposed on an incline, having its lower end connected with the condenser and its upper end provided with a valved outlet, means for cooling the foul gas receiver and a connection between the lower end of said foul gas receiver and the receiver for liquid,

subscribed my name.

i FRANK HIRTH.l lVitnesses R. H. JACKSON, Jr., C. S. SMART. 

